Improvement in lamps



D. H. CHAMBERLAIN.

' Lamps. NOJSE GM. Patented Aug. 4,1874.

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UNITED STATES PATENT QFFICE.

DEXTER H. CHAMBERLAIN, OF WEST ROXBURY, MASSACHUSETTS. I

IMPROVEMENT IN LAMPS.

Specification forming part of Letters Patent No. 153,661, dated August 4, 1874; application filed May 29, 1874.

To all whom "it may concern:

Be it known that I, DEXTER H. CHAMBER- LAIN, of West Roxbury, in the county of N orfolk and State of lVIassachusetts,have invented certain new and useful Improvement in Packed Lamps; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings and to the letters of reference marked thereon, which form apart of this specification.

My invention relates to improvements in packed lamps, consisting in the employment of a flexible spiraLspring wick-holder for the purpose of preventing the wick from twisting and kinking when the cap of thelamp is screwed into the bowl, by which employment the wick can be operated vertically in the wick-tube without binding or sticking, as the case is in the ordinary packed lamps, where no wickholders are used.

By the employment of a flexible wick-holder I gain the advantage of always being able to keep the lower end thereof in contact with the bottom of the lamp, whereby I am able to draw the liquid used in the lamp from as low place as possible. This could not be accomplished if a rigid wickholder were employed, for the reason that it is very difficult to regulate the proper length thereof, owing to the inequality of the depth of difi'erent lamps.

On the drawing is represented a central 1ongitudinal section of my improved lamp.

to represents the bowl of an ordinary packed lamp, and b represents the perforated well in the usual manner. 0 is the packing, saturated with naphtha or other liquid, as usual. d is the cap, screwed in the upper part of the bowl the wick when the cap is screwed in the bowl.

Where a wick-holder is not used in a lamp the wick is very liable to get so twisted and kinked that it cannot be raised by the regulatingscrew, and for this reason otherwise good lamps have been thrown away as useless.

The wick-holder It, being flexible, is automatically compressed when the cap (I is screwed onto the top of the bowl a, by which I obtain the advantage of having the lower end i thereof always in contact with the bottom of the I bowl or the thin layer of packing resting thereon, as shown in the drawing. The flexible wick-holder It allows of the free access to the wick of the naphtha from all sides.

Having thus fully described the nature and construction of my invention, I wish to secure by Letters Patent, and clai1n The flexible spiral-spring wick-holder h, attached to the screw-cap d and provided with a bottom, 1, combined and arranged with a a packed lamp, a b c, in manner and for the purpose set forth.

In testimony that I claim the foregoing as my own, I have affixed my signature in the presence of two witnesses.

DEXTER H. CHAMBERLAIN. Witnesses:

ALBAN ANDREN, JOHN R. HEARD. 

